Question

a chemist needs to order Na2B4O7. One supplier offers it in an anhydrous (without water) form, while another offers it as a hydrated crystal, Na2B4O7*10H20. if the prices from the two suppliers are the same for a 500.0-g bottle, which one would supply more of the desired Na2B4O7. explain.
please help !

Answer 1

So 500 g Na2B4O7 = 100.00
and 500 g Na2BrO7.10H2O = 100.00
Wouldn't it appear that the second one you are paying for water + Na2B4O7 while in the first one you are getting ALL Na2B4O7 without the water.